Telescopic sight mount for rifles

ABSTRACT

SIGHT MOUNTS FOR A TELESCOPIC SIGHT ARE SECURED TO THE RING AND TO THE BRIDGE OF THE RECEIVER OF A RIFLE IN A MANNER WHICH POSITIONS THE LINE OF SIGHT OF THE TELESCOPE RELATIVELY CLOSE TO THE LONGITUDINAL AXIS OR CENTER LINE OF THE BORE OF THE RIFLE BARREL WITHOUT WEAKENING THE RECEIVER RING. THE RECEIVER RING AND THE RECEIVER BRIDGE ARE PROVIDED WITH INTEGRALLY FORMED LONGITUDINAL RIBS, EACH RIB BEING FORMED WITH A PAIR OF ARCUATE RECESSES DISPOSED ON OPPOSITE SIDES OF EACH RIB. EACH ARCUATE RECESS HAS AN INWARDLY INCLINED BEARING SURFACE ADAPTED TO ENGAGE A MATCHING ARCUATE BEVELED LOCKING ELEMENT OF THE SIGHT MOUNT. BECAUSE OF THE ARCUATE CONFIGURATION OF THE MOUNT-RECEIVING RECES, IT IS POSSIBLE TO LOCATE THE RECESSES CLOSER TO THE LONGITUDINAL CENTER LINE OF THE RIFLE BARREL WITHOUT REDUCING THE STRENGTH OF THE BARREL IN THE CRITICAL AREA OF THE CARTRIDGE CHAMBER. LONGITUDINAL MOVEMENT OF THE SIGHT MOUNT RELATIVE TO THE RECEIVER IS PREVENTED BY A DEPENDING LUG WHICH ENTERS A TRANSVERSE SLOT FORMED IN THE UPPER SURFACE OF THE RECEIVER RIB.

Oct. 12, 1971 H. SEFRIED ETAL 3,511,605

TELESCOPIC SIGHT MOUNT FOR RIFLES Filed May 7, 1969 m mm b "I .y. M

INVENTORS HARRY H. SEFRIED LEROY J. SULLIVAN M M m,%fl-

ATTOR N EYS United States Patent Office 3,611,606 Patented Oct. 12, 1971 US. Cl. 42-1 S 4 Claims ABSTRACT OF THE DISCLOSURE Sight mounts for a telescopic sight are secured to the ring and to the bridge of the receiver of a rifle in a manner which positions the line of sight of the telescope relatively close to the longitudinal axis or center line of the bore of the rifle barrel without weakening the receiver ring. The receiver ring and the receiver bridge are provided with integrally formed longitudinal ribs, each rib being formed with a pair of arcuate recesses disposed on opposite sides of each rib. Each arcuate recess has an inwardly inclined bearing surface adapted to engage a matching arcuate beveled locking element of the sight mount. Because of the arcuate configuration of the mount-receiving recess, it is possible to locate the recesses closer to the longitudinal center line of the rifle barrel without reducing the strength of the barrel in the critical area of the cartridge chamber. Longitudinal movement of the sight mount relative to the receiver is prevented by a depending lug which enters a transverse slot formed in the upper surface of the receiver rib.

BACKGROUND OF INVENTION The means for securing a telescopic sight to the receiver of a rifle include bases secured to the receiver with screws to which removable mounts are attached, various types of .lugs on the mount which enter recesses in the receiver,

SUMMARY OF INVENTION This invention provides, in combination, a construction of the ring and the bridge of the receiver of a rifle and two telescopic sight mounts to which is attached a telescopic sight, the mounts being removably secured to the ring and the bridge of the receiver whereby the telescope and the attached mounts can be secured to and removed from the rifle many times without appreciable change in the point of aim and whereby the center line of the bore is a minimum distance from the sight line of the telescopic sight. The ring and the bridge each has an upwardly and longitudinally extending integral rib, and each rib has a transverse slot and oppositely facing arcuate recesses, each recess having an inclined bearing surface. Each mount has means for being secured to the telescopic sight and an under portion having a surface which engages the rib of either the ring or the bridge. The under portion of each mount has a depending integral lug which engages the transverse slot formed in the rib, an integral beveled portion which enters one arcuate recess and engages the inclined bearing surface thereof and a screw having a depending beveled portion which enters the opposite recess and engages the inclined bearing surface thereof for securing or removing the mount to the rib. Thus, when the telescopic sight is securely mounted on the rifle, the screws of the mounts can be backed off and then the telescopic sight and mounts can be tilted sidewise and removed from the rifle.

The combination of ring and bridge construction and sight mounts reduce the vertical distance between the sight line of the telescope and the center line of the bore while allowing maximum engagement of sight mounts to the receiver. Moreover, this reduction in distance is achieved without significantly cutting into or otherwise reducing the thickness of the ring in the area where receiver strength must be maintained.

BRIEF DESCRIPTION OF THE DRAWING In the drawing:

FIG. 1 is a side elevation of the receiver portion of a rifle with an embodiment of the invention;

FIG. 2 is a plan view of the receiver ring of FIG. 1;

FIG. 3 is a sectional view at 33 of FIG. 2; and

FIG. 4 is a sectional view at 44 of FIG. 1.

DESCRIPTION OF PREFERRED EMBODIMENT The conventional bolt action rifle shown in the drawing includes the usual stock S, barrel B and receiver R, the barrel being threaded into the ring 1 of the receiver. The ring 1 and bridge 2 are integral parts of the receiver R, and the longitudinal center line L of the bore coincides with the top edge of the stock. As shown in the drawing, the forward sight mount 3 is mounted directly on the receiver ring 1 and the rearward sight mount 4 is mounted directly on the receiver bridge 2.

The ring 1 and the bridge 2 have similar integrally formed, longitudinal ribs 5 and 6, respectively. Each rib 5 and 6 has a flat upper surface 7 and 8, respectively, and longitudinal serrations 9 and 10 are formed in the surfaces 7 and 8 for the dispersion of light. It will be noted that the integrally formed ribs extend upwardly and that the rib 5 has the eflect of reinforcing the receiver ring 1 in which the barrel chamber is disposed and which, therefore, must contain the explosion of the cartridge. It is convenient in the construction of the receiver to have the top of the bridge 2 lower than the top of the ring 1, and it is accordingly necessary to appropriately proportion the sizes of the sight mounts 3 and 4.

The essential elements of the ring 1 and the bridge 2 are the same, and only the ring 1 will be described in detail. 0n opposite sides of the ribs 5 of ring 1 are arcuate recesses 15 and 16 having inwardly sloping hearing surfaces 17 and 18 respectively, and the top of the rib 5 has a transverse slot 19 (shown best in FIG. 2) which may have a curved bottom (shown in broken lines in- FIGS. 3 and 4).

Each mount 3 and 4 consists essentially of the same elements which cooperate with similar ribs 5 and 6, and it is necessary, therefore, to describe only mount 3 and its association with rib 5 of ring 1. The mount 3 comprises a base 20, a ring segment 21, a threaded locking key 22 mounted in the hole 23 formed in the base 20, and a knurled nut 24. The base 20 advantageously is made by an investment casting process. The flat under surface 25 of the base 20 makes bearing contact with the flat upper surface 7 of the rib 5. The base 20 has a depending locking portion 26 which enters the arcuate recess 15, the inwardly sloping surface 27 of the portion 26 making bearing contact with the sloping surface 17 of the recess 15. The locking key 22 has a depending portion 28 having an inwardly sloped surface 29 which enters the arcuate recess 16. When the nut 24 is tightened the portion 28 is drawn into tight locking engagement with the inwardly sloping surface 18 of the recess 16. When the base 20 is secured to the rib 5 of ring 1 as shown in FIGS. 1 and 4, a depending lug 30 integrally formed in the base 20 enters the slot 19, and this lug 30 prevents the mount 3 from shifting longitudinally during the recoil of the rifle.

The upper part of the base 20 has a semi-cylindrical inner surface 31, and the upper ring segment 21 also has a semi-cylindrical inner surface 33. The two surfaces 31 and 33 make a substantially cylindrical opening adapted to receive the cylindrical tube of the telescopic sight T. The base 20 has laterally extending flanges 34 and 35, and the ring segment 21 has laterally extending flanges 36 and 37 mating therewith, the ring segment 21 being forced into tight engagement with the telescopic sight by means of he screws 38 and 39.

When using the telescopic sight mount of my invention both mounts 3 and 4 are secured to the telescopic sight tube T. The locking portion 26 is then hooked in the arcuate recess 15 and the locking key 22 is hooked in the arcuate recess 16. The nut 24 is then tightened, thereby drawing the bearing surfaces 27 and 29 into tight contact with the sloping surfaces 17 and 18 and forcing the surface 25 into rigid contact with the top 7 of the rib 5.

We claim:

1. In the combination for mounting a telescopic sight on a rifle which includes a receiver ring and a sight mount adapted to be directly secured to said ring, the ring being provided with, a longitudinal rib, the rib having an essentially flat upper bearing surface and two recesses disposed on opposite sides of the rib, each recess having an inwardly inclined bearing surface, the mount having a base and means for securing the telescopic sight, the mount base having an under bearing surface which engages the upper bearing surface of the rib and an integral beveled locking portion which enters one of the recesses formed in the rib and engages the inclined bearing surface thereof, a locking key slidable in the base having an inclined beveled portion which engages the inclined hear-- ing surface of the other recess, and means preventing longitudinal shifting of the base when secured to the ring, the improvement which comprises forming said longitudinal rib integrally with the receiver ring, and forming said integral rib with two arcuate mount-receiving recesses disposed on opposite sides of said rib.

2. The combination for mounting a telescopic sight on a rifle which includes a receiver ring and a sight mount adapted to be directly secured to said ring, the ring being provided with an integrally formed longitudinal rib, the rib having an essentially flat upper bearing surface and two arcuate recesses disposed on opposite sides of the rib, each arcuate recess having a inwardly inclined hearing surface, the mount having a base and means for securing the telescopic sight, the mount base having an under bearing surface which engages the upper bearing surface of the rib and an integral beveled locking portion which enters one of the arcuate recesses formed in the rib and engages the inclined surface thereof, a locking key slidable in the base having an inclined beveled portion which engages the inclined surface of the other recess, and means preventing longitudinal shifting of the base when secured to the ring which comprises a transverse slot in the rib between the arcuate recesses, and a depending lug on the base which enters the slot when the base is secured to the ring.

3. The combination of claim 1 which includes, in addition to said receiver ring and sight mount therefor, a receiver bridge and a sight mount adapted to be secured to said bridge.

4. The combination of claim 3 in which the receiver bridge is provided with an integrally formed longitudinal rib, the bridge rib having an essentially flat upper hearing surface and two arcuate recesses disposed on opposite sides of the rib, each bridge rib recess having an inwardly inclined bearing surface, the bridge sight mount having a base and means for securing the telescopic sight, the bridge sight mount base having an under bearing surface which engages the upper bearing surface of the bridge rib and an integral beveled locking portion which enters one of the arcuate bridge rib recesses formed in the bridge rib and engages the inclined surface thereof, a locking key slidable in the bridge sight base having an inclined beveled portion which engages the inclined surface of the other arcuate bridge rib recess, and means preventing longitudinal shifting of the base when secured to the bridge.

References Cited UNITED STATES PATENTS 1,770,451 7/1930 Baker 3350 2,306,972 12/1942 Meisel 3350 3,040,433 6/1962 Heinzel 33-50 3,276,127 10/ 1966 Abrahamson 42--1 S 3,424,420 1/ 1969 Seiderman 42-1 S SAMUEL FEINBERG, Primary Examiner C. T. JORDAN, Assistant Examiner US. Cl. X.R. 

